ultima tower

X-Seed 4000. tower of fantasy full size The X-Seed 4000 was a concept for a megatall skyscraper. tower of fantasy account [1] Its proposed 4-kilometre (2 5 mi) height, 6-kilometre-wide (3 7 mi) sea-base, and 800-floor capacity could accommodate 500,000-1,000,000 inhabitants This structure would have been composed of over 3,000,000 tons of steel